I remember working for a company who insisted all teams had to usr whatever corp instant messaging/chat app but our sysadmin+network team maintained a jabber se

I remember working for a company who insisted all teams had to usr whatever corp instant messaging/chat app but our sysadmin+network team maintained a jabber server + a bunch of core documentation synchronized on a vps in a totally different infrastructure just in case and sure enough there was that a day it came handy.